A vulnerability in the TACACS+ command authorization code of Cisco NX-OS Software could allow an authenticated, local attacker to execute certain commands without TACACS+ server authorization. The vulnerability is due to the processing of certain commands when executed in a sequence. An attacker could exploit this vulnerability by executing multiple commands in a sequence. A successful exploit could allow the attacker to execute certain commands without TACACS+ server authorization. Cisco has confirmed the vulnerability in a security notice; however, software updates are not available. To exploit this vulnerability, an attacker must have local access to an affected device. This access requirement reduces the possibility of a successful exploit. Cisco indicates through the CVSS score that proof-of-concept exploit code exists; however, the code is not known to be publicly available.
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
| Version | Description | Section | Status | Date |
| 1.0 | Initial Release | NA | Final | 2014-Jan-23 |
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